Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: Ryan Jacob on March 28, 2018, 12:22:15 am

Title: Rock ID
Post by: Ryan Jacob on March 28, 2018, 12:22:15 am

Anyone have any ideas on exactly what it is?
https://imgur.com/a/7mZLk

Title: Re: Rock ID
Post by: bjrogg on March 28, 2018, 06:11:22 am

Ryan I'm not a rock expert, but it looks knapable from my phone. Hopefully someone else more schooled in rock will help you out here. Might help if they knew what region you got it from. You can PM me the exact coordinates.lol.
Hope you get some nice points from it.
Bjrogg

Title: Re: Rock ID
Post by: Ryan Jacob on March 28, 2018, 10:13:09 am

I got it from Batangas, in the Philippines

Title: Re: Rock ID
Post by: bowmo on March 28, 2018, 12:20:51 pm

No clue. Reminds me of black and white nova but clearly isn't. Certainly knappable which is better than knowing the name...haha

Title: Re: Rock ID
Post by: mullet on March 28, 2018, 05:48:52 pm

To me it looks like a low grade Dacite or Gneiss.

Title: Re: Rock ID
Post by: Ryan Jacob on March 28, 2018, 07:58:02 pm

Mullet
If it is low grade dacite, should I heat treat it? Spalls real easy however...

Title: Re: Rock ID
Post by: Ryan Jacob on March 28, 2018, 08:00:36 pm

Some spalls
 https://imgur.com/a/HoaH6

Title: Re: Rock ID
Post by: Chippintuff on March 28, 2018, 08:11:50 pm

Heat won't make glass products chip any better. If it is low grade dacite, I think it may have ash crumbs in it. Those can cause trouble.

WA

Title: Re: Rock ID
Post by: bjrogg on March 29, 2018, 05:46:46 am

looks like some pretty decent spalls to me. I would give it a try. looks better than anything I find around here.
Bjrogg

Title: Re: Rock ID
Post by: RickB on March 29, 2018, 06:51:54 am

Quote from: Ryan Jacob on March 28, 2018, 08:00:36 pm

Some spalls
 https://imgur.com/a/HoaH6

This last photo you posted shows a coral nodule mixed in with the spalls - it's located on the upper right side of the photo. I can see the polyps. Rick B

Title: Re: Rock ID
Post by: mullet on March 29, 2018, 05:08:58 pm

Rick, those do look like polyps. I've never seen coral like that, though. I'd say whack on it and see if it works, no heat.

Title: Re: Rock ID
Post by: Ryan Jacob on March 29, 2018, 08:21:53 pm

It’s not a nodule, It’s just the empty shell of a dead coral, lots of them around here

Title: Re: Rock ID
Post by: Ryan Jacob on March 30, 2018, 11:26:25 pm

Yeah, lesson learned, don’t try to knap stuff with this many inclusions, knaps like concrete and the flakes dont travel

Title: Re: Rock ID
Post by: mullet on March 31, 2018, 09:06:50 am

Gneiss. ;)